Fastening device



Sept. 1, 1953 c. J. DALLEY FASTENING DEVICE 2 Sheets-Sheet 1 Filed Jan.31. 1948 INVENTOR. mar/; Ifla [lay ATTORNEY p 1, 1953 c. J. DALLEY I2,650,845

FASTENING DEVICE Filed Jan. 51, 1948 2 Sheets-Sheet 2 7g;

INVENTOR.

42 Y BY flair/as [flalleg ,mmlliil fill H atlwcxw wa;

Patented Sept. 1, 1953 UNIT ED STATES PATENT 0 PF I CE FASTENING DEVIGE'Charles .I. Dalley M'aplewood N; Ji assignor to William'Langhein; EmilLangbein, and Charles Langbein; a partnership doing business as Wm.Langbein &. Bros, New York; N. Y2

Application 'January31, 1948;.SerialtNo: 5,670;

In the aforementioned co'-pending application, I

fastening members are illustrated which generally comprise abolfihead-onnut having a cylindricalsurface and'an annular memberhavingan elliptical surface-of such shape to cooperate with thecylindricalsurface to lock the bolt head or nut against rotation.

The present invention aims to further improve this lockingaction.

Accordingly; an obj ect'of thepresent invention is to provide improvedfastening devices for' locking bolt and nutmembers and the likeagainst'rotation; I

Another obj'ectis to provide such fastening devices which are-simpleinconstruction, inexpensiveto manufacture and highly effective inoperation;

A further object consists in the construction of parts and arrangementof elements whereby the" foregoing objects are accomplished.

Other andfurther objects will be obvious upon an'understanding' of theillustrative embodiment aboutto' be described, orwvill be indicated inthe appended claim, and various advantages not referred to herein willoccur to. one skilled" in theartiupon.employmentofthe invention inpractice.

In accordance with the invention", the foregoing" objects areaccomplished" by forming" the" deltheadornutwvith a tapered or frustoconical" surface and forming the annular'member'witha; similarlyshapedcooperating elliptical surface whereby a wedging actionbetween the bolthead" or nut and the annular'memberisprovided-which increases theeffectiveness'of the locking: or fastening action. of these elements.Theannular member is? further.- improved" by. rendering? the:samersomewhat resilient totin'cr'ease its grip on thebolt headzorinutiIn theiacc'ompanying drawings:

Figure? 1. is an elevational View of a pair of cuttingshears; the bladesof Whichare adjustablysecured for: relative movement by a:fasteningidevice; in: accordance with; the; present invention;

Figure 211?; a fragmentary exploded perspective view :01? :the:shears-and thesfastenin'g device Eigure 3" is; asectional; viewot theelements: shown in; Figure. 2:; prior; to; being assembled.

Figure 4 in a. sectional: view of. the elements sho.wn.in.-.assembledrelation, taken. along, theline 4-.- 4 on Figureflt.

Figure. 5,.isza' sectional. View. similar to. Figure 4, taken alongthe.1ine.5.-5.on.Eigure. 1.

Figure. Sis anenlarged end-view,.in elevation, otthe annular. member.

Figure. '7 isa-fragmentary sectional. view taken.

along theminor. axis of. the. annular. member (linev I -If on- Figured),and illustrating the. elements cooperating with the annular member..

Figure 8.:is1a'fragmentary. sectional. view. similar toiFigures 7 but.taken along the major. axis of; the. annular; member. (line. 8-B onFigure 6).

Figure.- Q- isTa fragmentary exploded. perspective view illustrating.a-inodified embodiment. of the invention.

Figure 1.0-is a sectional. view of the-elements shown in Figure 9-inassembledrelation.

Figure; 1:1: is a. sectional view taken. along the line I II I on Figure10.

Figure- 12: is :an enlarged. end view, in elevation, of. the: modifiedannular member. illustrated in Figures-9-1to 1 1,inc1usive..

Referring to: the. drawings;. and more particularly: to -Figures 1' to8: thereof; there is shown a. fastening device in: accordance with theinvention; illustratediby, Wayof-exa-mple as serving to adjustablysecure the blades of a pair-0f cutting shearssforrelative movement;

The: shears .may' be or? conventional construction-having blades I.fiiandi I :I i formedi'with handles I 2 and I 4"; respectively; andbeing pivotally connected at- I5 (Figure: 1)? by a fastening deviceabout to be described. In order to accommodate theia'stening' device,the blade I i! -isformed With a-circularaperture I6having7a counterboreI1, and the blade H is formed with an elongated 51017 01 aperture I8havingnon-circular' or flat sid'Bs lsan'di arcuate? ends 251 (Figure 2),the distance"- between. the? ends: being slightly greater than". thez.diameterrorthe aperture: I I5; The purpose: offtheiapertureg I6: and theslot I8, as will become apparent hereinafter, is to mount the blade:III;- for rotation: about. the fastening; device and to: fix'theblade. II against rotation with respect to'thei'fasteningdevice:

The: fastening; device comprises a pair of cooperating; screw threadedmembers 2| and 22,

- an annular member 24 for locking the mem.-

bers: Z-I' and: 22 against; relativerotation. As shown in. Figures 2 to?8; the-member 2i isthe female? screw element andtheimember 22- is the;

male :screw elementiofiainutandscrew. arrange.- menti.

The member 2| is in the form of a pivot p com risin a head 25 adapted tobe disposed in the co nterbore I'I (Figures 3 to 5), and a generallycylindrical internally screw threaded shank 26 for ivotally mounting theblade I and having non-circular or flat sides 21 constructed andarranged to extend into the slot I8 of the blade II an arbor the bladeon the member 2 I.

The member 22 is in the form of a screw comprising a head 29 formed witha ta ered or frustoconical side 30 and a slot 3| for the rece tion of atool or the like. and an e ternally screw-threaded shank 32 coo eratingwith the internal threads of he member 2 I.

The annular member 24 may be formed of sheet metal and com rises acircular centrally apertured base or shoulder port on 34. a pair ofdiametrically o posite fin ers 35 extending from the inner ed e of thebase 34, and a rim 3 extending from the outer ed e of the base orti n inthe Op osite direction of the fin ers 35. The inner surface of the r mis ell ptical and enerally frusto-con ca-l. as shown m re particular yin Fi ure 6v and s somewhat resilient or fle ib e to en b e the r m oassume en eralhr circular shape when the screw head 29 is forced into ena ement therew th. In order to increase the resilience of the ann larmember 24. the base port on 34 may be not hed. or re essed at one ormore oints alrm he inner edge, as indicated at 3'! (Figures 2 and 3) Tas emhlin the fastenin dev ce iust described (Fi ures 3 to 8) t e shank26 of the memher 2| is inserted throu h the a erture I6 of the blade II! andthe head 25 thereof is dis osed in the co nter-hare I'Iv The freeend o the shank 26 is inser ed into the slot IR of the blade I I. withthe flat s s 2 of the shank en a n the flat s es IQ of the slot and thearcuate ends 20 of the slot I 8 being spaced from adjacent shank portios.

The fin ers 35 of the member 24 are then inserted into the spacesprovided between the ar- Cwnte en s 20 and the shank 26, asaforementioned. with one side of the base 34 abutting the o ter side ofthe shear blade II (Figure 4), whereby the member 24 is retained againstrotation w th respect to the shear blade I I and the member 2 I.

T e member 22 is then inserted through the central aperture of the base34 and its shank 32 is threaded into the threaded bore of the shank 26.As the members 2| and 22 are screwed together, the tapered head 29readily engages the rim 36.

By reason of the elliptical shape of the rim and the dimensions of thetapered portions of the rim and head, the head tends to distort the rimfrom an elliptical shape (Figure 6) to a generally circular shape. Forexample, as shown in Figures 7 and 8, the distance across the rim atminor and major axes, respectively, can be increased and decreasedrespectively, from the full line positions to the broken line positions.

The head 29 exerts an end thrust on the rim, which due to its resilienceyieldably tensions the blades I3 and II together. The amount of tensionapplied between the blades can be readily regulated by adjusting theextent the head 23 is forced into the rim 36.

An important advantage of the present fastening device is thatmanufacturing variances in the tapered portions do not adversely affectthe operation of the device whereby close tolerances need not beobserved. Also, the tapered portions enable the blades to be adjustedover a wide range of varying tension.

Referring to Figures 9 to 12 0f the drawings, there is shown a modifiedembodiment of the present invention, wherein parts identical to thoseilulstrated in Figures 1 to 8 have the same reference numerals appliedthereto. A portion of a pair of shears is shown comprising blades I0 andII formed with apertures I6 and I8, respectively, for reception of thefastening device. The aperture I8, like in the previously describedembodiment, has fiat sides I9 and arcuate ends 20 (Figure 9).

The modified fastening device comprises a pair of cooperating screwthreaded members 4| and 42 and. an annular member 44 for locking themembers 4| and 42 against relative rotation. As shown, the member 4| isthe male screw element and the member 42 is the female screw element ofa nut and screw arrangement.

The member 4| is in the form of a pivot; pin comprising a head 45 and agenerally cylindrical shank 46, externally screw threaded adjacent thefree end thereof and formed with non-circular or flat sides 41constructed and arranged to extend through the apertures I6 and i8 andarbor the blade II on the member 4|. The blade in is adapted to bepivotally mounted on the member 4| adjacent the head 45.

The member 42 is in the form of a nut having a head 49 constructed to beengaged by a tool or the like and being internally screw threaded forcooperation with the screw threads of the shank 46. The nut has atapered or frusto-conical portion 50 at one end thereof, the function ofwhich will be described hereinafter.

The annular member 44 (Figure 12) is in the form of a Washer-likeelement, preferably formed of sheet metal, and has a centrally aperturedbase or shoulder portion 54 formed with a pair of diametrically oppositenon-circular or straight portions 55 at the inner edge thereof forengaging the side portions 4! of the shank 46. The base 54 is furtherformed with a rim 56 extending from the outer edge thereof, the innersurface of which is elliptical and generally frustoconical. This rim issomewhat resilient or flexible and is adapted to be formed into agenerally circular shape when engaged by the portion 50. The resilienceof the annular member may be increased by forming a notch or recess 51at the inner edge of the base portion intermediate the portions 55.

In assembling the fastening device just described (Figures 10 and 11),the shank 46 of the member 4| is inserted through the apertures I6 andI8 of the blades I0 and II, respectively, with the head 45 engaging theouter side of the blade l0 and the flat sides 47 of the shank inregistry with the flat sides I9 of the aperture I8 to arbor the blade II and member 45.

The annular member 44 is then mounted on the free end of the shank,which extends through the aperture I8, with the straight portions 55 ofthe base 54 in registry with the fiat sides 41 of the shank and the baseor shoulder 54 abutting the outer side of the shear blade I I, wherebythe member 44 is retained against rotation with respect to the blade I Iand the member 44.

The nut member 42 is then screwed on the shank 46 to draw thefrusto-conical portion 50 into the rim 56 and tension the bladestogether and lock the nut member 42 on the shank to accomplish theadvantages described in connection with the embodiment shown in Figures1 to 8.

A further advantage of the modified annular member is that it isextremely simple and can be readily manufactured by automatic machineryin a minimum number of operations and from a small amount of material.

While the fastening devices of the present invention have beenillustrated and described in connection with shears by way of example,it will be readily understood that the same may be applied to otherdevices than shears, wherein a rotative member requires adjustment andthen is to be held permanently in such adjusted position.

From the foregoing description, it will be seen that the presentinvention provides improved fastening devices for relatively rotatablemembers which are adjustably tensioned as described herein. The devicesare simple in construction, economical to manufacture, easy to assemble,and are efiective and practical in operation. The devices are rugged inconstruction and are adapted to remain in adjustment upon being subjectto rough usage.

As various changes may be made in the form, construction and arrangementof parts herein, without departing from the spirit and scope of theinvention and without sacrificing any of its advantages, it is to beunderstood that all matters herein are to be interpreted as illustrativeand not in any limiting sense.

What I claim is:

In combination, a pair of relatively rotatable members each having anaperture therein one of which has a pair of non-circular surfaces, apivot member having a shank extending into said apertures formed withscrew threads and a pair of external non-circular surfaces for engagingsaid non circular surfaces of said aperture, said shank and saidaperture with said surfaces being constructed and arranged to provide apair of spaces intermediate said surfaces, a screw member secured tosaid pivot member having a irusto-conical head, and an annular memberhaving a shoulder portion formed with a pair of fingers extending intosaid spaces and being formed with an elliptical frusto-conical rim ofcontinuous periphery engaged by said head.

CHARLES J. DALLEY.

References Cited in the file of this patent UNITED STATES PATENTS2,524,651 Dalley Oct. 3, 1950

